Chuck for gear-generating machines



Jan. 17, 1928.

E. FINSEN ET AL CHUCK FOR GEARGENERATING MAGHINES Filed June 5, 1926 52 |NvEN ToRs Eyvznd zzzsezz c .Earl

ATTORN Patented Jan. 17, 1928.

EYVIND FINSEN AND SCHUYLER H. EARL, OF ROCHESTER, NEW' ltittftdii T; `trier-3..

YORK, ASSIGNOR-S T0 GLEASQN WORKS, 0F ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

CHUCK FOR GEAR-GENERATING MACHNES.

'Application filed .Tune 5, 1926. Serial No. 113,990.

The subject of the present invention is a chuck and the invention relates `more particularly `to chucks for securing gears or gear blanks in position upon machines upon which Work is to be done upon a gear or blank.

The primary object of the present invention is to provide a chuck which may be constructed of a few simple parts which will be simple in operation and of loiv cost.

it further object of this invention is to provide a chuck for gear generating vmachines and a control means therefor' of such form that the chuck may be quickly and casi y controlled by the operator of the machine.

il still further object of this invention is to provide a chuck for gear generating machilies and a control means therefor which will permit of the rolling motions required iu such machines to generate the tooth profiles and which at the same time will enable the gear blank to be quickly cla-mpedin position or released therefrom. i

Other objects of the invention will be apparent hereinafter from the specification and from the recital of the appended claims.

l pre ferrcd embodiment of the invention is illustrated iii the accompanying drawing, in which:

Figure 1 is a plan view, partly in section, of a gear generating machine, showing a preferred embodimentof this invention in use thereon; n

Figure 2 `is a fragmentary view looking iii tbev direction of the blank, showing the ymeans employed for securing the blank in` clamped position;

`Figure 3 is an enlarged detail sectional Viewv showing the outer end of the chuck rod and the means for controlling the same; and

Figure 4t is a side elevation, partly in section, of the control lever and cam.

In Figure 1, one form of chuck constructed according to this invention is shown in use upon a gear generating machine of the type described in the copending application of J ames E. Gleason et al., SerialNo. 624i,- 962, filed March 14, 1923. It Will be understood, however, that the invention is capable of use upon other forms of machines for producing gears, whether generating or forming and that, in general, it is capable of suchfurther uses and of such further modifications as fall Within the scopeof the invention and .vithin the limits of the ap pended claims. i

The machine shown includes a bed or frame 10 upon which is` slidably adjustable a tool head 11 which carnes a pair of reciprocating tools, one of which 12 is to be ,seen in the drawing. 'llhe frame 1() is-provided with an upright portion 18 provided with ways lll Within Which are guided the ways 15 `of an oscillatory carrier or cradle 1G. The cradle or carrier 16 is providedon its upper surface with circular slots 17. Mounted on the cradle 16 is a support 18 upon which the blank or gear G to be operated upon is carried. The support 18 iS angulariv adjustable upon the cradle so that the blank or gear G may be brought into proper operating relation With respect Vto the tools. This support 18 may be `secured .inany adjusted position byineans of bolts 19 which engage in the circular T-slots 17. .lournaled within a pedestal 2O on the blank carrier or support 1S, is a sleeve 22. With inthis sleeve 22 rotatably mounted a second sleeve Q8 to which the blank or gear to be operated upon is secured. Secured to the sleeve 22 is a bevel gear segment 24 which .meshes Wit-h a stationary segment 25 mounted on the frame of the machine. In the operation of the machine shown, the tooth surfaces are generated by imparting reciprocatori/fY movements to the tools and simultanemisly effectingI fa relative rolling motion between the tools and blank. `'lliis rolling motion consists of a rotary move* ment of the blank on its axis. combined with a rotary .movement of the cradle on its axis. The rolling` motion is effected from the cradle. Duringthe cutting operation the sleeves 22 and'l are connected together by the elements of the indexing mechanism which are indicated `generally at 26 and which are described more particularly in the application above referred to and the movement ofthe cradle causes the bevel gear segment. let to `roll upon the stationary segment 25, thus rotating the sleeves 22 and 23 and the blank@- Which is secured to the sleeve 23, as will presentlyr be described. The combined .rotation of the sleeve Q3 and of the cradle 16 constitute the generating or rolling motion ofthe machine. After ya cutting operation has `been coi'npleted, the

tool and blank areivithdra-Wn relatively to` lill cach other, asdescribed in the application mentioned, and the blank indexed. During this indexing period the cradle movement is reversed. The reverse movement of the cradle causes the segment 2st to roll in the opposite direction on the segment 25.

The purpose of the present invention is to provide a :t'orm of chuck which magT be. employed to firmly secure a hlank in position and which at the same time will be of simple construction, and which ran be instantly operated. ln the preterred i'orm ot' the present invention7 a heavj,v coiled spring is employed for holding the blank clamping means in clamping position While a lever employed 'for moving the rod, which carries this clamping means, against the action ot' this spring so as to release the gear.

Mounted Within the sleeve is' an arbor which is provided with a tapered portion which seats in a similarlyY tapered portion of the bore of the sleeve E23. The blank o1' ,gear Gr to be operated upon is clamped against the outer 'face of this arbor 30. Extending through the bore ot the gear, the bore oi' the arbor 30 and the bore ot the sleeve 2S is a reciprocahle rod 3l. This rod carries the means tor holding` the rear in clamped position. The clamping means may be oiE aniT usual or suitable form. In the embodiment illustrated, a horseshoe Washer 32 is provided. The rod is provided with a circunr :terential recess and the washer is slipped into this recess. Then the rod is moved rearivardlT in the sleeve under action of the coiled spring, as will presently be described, the horseshoe Washer `fnglrges the face of the gear and clamps the ea1 against the outer face of the arbor 30. This rearward movement acts also to iirmly seat the arbor in the sleeve 23, so that during the operation ot the machine, the blank (l is firmly7 secured in position.

The rod 3l is screw-threaded adjacent its inner end and carries a nut 3ft between which and the inner end of the sleeve 23 there is interposed a heavy7 coiled springl 35. This spring 35 serves to constantly urge the rod into and hold it in clampingl position. The tension on the spring l5 maiY he adjusted. as is obvious` by adjusting the nut The inner end of the rod is headed as indicated at 36. The head 36 seats against a ball 3T which is mounted in a socket 38 provided in a mushroom headed member 39. The mushroom member 3S) is mounted for tilting or rocking movement in a sleeve 4:0 which is screiv-threaded upon the outer end ot the sleeve 23. This sleeve 4i() has the further functions of guarding this spring and of acting also as a means -for retaining` the index plate and the parts of the indexing mechanism Q6 in position.

The mushroom member 39 has a curved outer face 4A Which seatsfon a flat Washer 45 rebasan which is secured in the sleeve 410. The mushroom member 39 is provided with a stem or stud 42 which extends through an opening 43 provided in the end ot the sleeve "l-O and the mushroom member mayT be rocked by moving this stem or stud. The construction ot the mushroom member and the cooperating parts is such that when thc n'mshroom member is aligned `with the rod 3l., the spring Will hold the rod in clamping` position. but when the mushroom member is rocked or tilted :from a position ot' alignment with the rod into a position at an angle theretm the rod will bc lorced forward in the sleeve o3, the arbor 30 and the bore of the gear G, against the action of the sprino, thereby releasing the horseshoe washer 32 ilrom clamping position and permitting the same to he lilted oli ol the rod or to drop away from the same by gravity.

Any suitable means may he employed for rockingthe mushroom member 39. llilhcn a chuck constructed according to the present invention is employed upon a gear generating` machine, it is preferable to provide some means ior operatingl the chuck which will he both readily7 accessible to the operator oi. the machine and which at the same time will not interfere with the rolling motion ol the niiachine` During); the operation ot the machine described the blank support rolls up and doivn duc to the oscillation of the cradle lo. The mushroom member -ll cinseipientl'vY must be controlled 'from some member which mounted coaitially oiA the cradle 'lll and which is connected to the mushroom member so as to permit tree movement ot this mom ber during' the roll Without rockinglr it, Such a construction is shown in the arcomlainving drawing. 45 indicates a bracket which is adjustable on the cradle and which muv be secured in any adjusted position thereon bv means of bolts el@ which ennjae'e in the circular T-slots li'. .lournaled in this brochet 45 is a shaft di? to which is secureil a crank d3. Secured to the crank 41S is a member il-f) provided ivith an outer cam surface .30. .lournaled on thc stem or stud l2 of the mushroom member xl. is a sleeve 531 to which secured one end ot the anale lever .72. The opposite end of this lever is scclnfed to a bifurcated member BFL the arms ot which extend on either side of the shaft el, This biiurcated member 5? carries u roller spring one end of which is secured to the lever arm 52 and the other end of which is secured tothe pedestal Q0 serves to maintain the roller :vi-l in Contact at all times with the 1am surface 50 ot the member 29.

W'hen the apparatus is in the osition shown in Figure l the blank is clamped in position. As the cradle rolls up and down the sind Ll-Z will rotate in the sleeve 5'1 and thus the operations ol"- the macliine mayv pro cced without any interieremire from the lever lilo y52 or without the mushroom member 39 belever 52 outwardly againstJ the action of the spring 55 thereby rocking the mushroom member 39 in the opening 43 ot the sleeve 40 and forcing the rod 3l forwardly against j the 'action ot the spring 35. The horseshoe washer 32 can then be removed orw'll ot itself drop away. The gear G- kcan then be drawn over the outer end of the rod and taken olf the machine. lVlien a new blank .is to be chucked, the blank is pushed on the rod 3l, the horseshoe washer 32 is dropped vinto place and the crank 4S rotated to rock the mushroom member back into neutral position, thus permitting the spring 35 to expand and clamp the blank in position.

Instead ot a horseshoe washer, it is obvious that any other suitable torni of clamping means may be employed with this invention, as, for instance, the expansible bushing described in the copending application ot Schuyler H. Earl, Serial No. 723,287, filed June 30, 1924. n

`While the present invention has been described in connection with a machine for generating gears it is not intended to limit the invention to this use, but it may be employed on any form of machine for producing gears and upon other forms of ma chines also.

In general, it may be saitl,`tliat, while we have described a preferred embodiment ot our invention, the invention is capable of further modilication within its limits and the scope ot the appended claims, and that this application is intended to cover any variations, uses, or adaptations ot the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice in the art and may be applied to the essential featuresV hereinbetore set forth and as fall within the scope ot the appended claims.

Having thus described our invention, what we claim is:

Vl. In a chuck.y the combination ot a sleeve, a rod reciprocable in said sleeve and in the bore ot the object to be chucked, means carried by said rod adapted' to engage the outer tace ot' the object, a tiltable member mounted in the sleeve and provided with a curved outer face seatingagainst a seat provided, therefore, in said sleeve, a coil spring interposed between said rod and sleeve for torcing the rod and clamping means axially in one direction to engage the objectfto clamp the object on the sleeve and for maintaining` the rod in operative relation with the op-` posite 'face of said tiltable .member and means for rocking said tilt-able member to torce the rod in the opposite direction `against the action. of the spring to release the object.

2. In a chuck. theV combination ot a sleeve, a rod reeiprocable in .said sleeve and in the bore ot the object to be chucked, means carried by the rod adapted to engage the'outer `face o't said object, a coil spring interposedbetween said rod and sleeve tor forcing the rod and clamping meansfaxially to engage the object to clamp the object on 'the sleeve, a tiltable member arranged in operative relation to the rod and adapted to be rocked troni a position ott alignment with' the rod to a position at an `angle thereto tor moving the rod against the resistance ot the spring to release the object and means tor rocking said member.

3.' In a gear generating machine, a rotatable blank support, a cutter mechanism, a movable cradle upon which the blank support is mounted, means for positioning the tool and blank in operative relationship;

means tor clamping an object on the blank support and the means for releasing said clamping means, comprising, a movable member having a cooperative relation with the clamping means, a. lever armtor moving .said member journaled on said members a eam mounted for rotation on an axis coin-` ciding with the axis ot said cradle and having an operative connection with the lever arm, and means for rotating the cam.

4. Ina gear generating machine, a tool, a rotatable blank support, a `movable cradle upon which the blank support is mounted,l `means for positioning thetool and blank in operative relationship, a memberadapted to be moved axially in one direction to clamp a blank on the blank support and to be moved axially in the ropposite direction to release the blank, a movable membertor controlling the movements ot the `tiret named member rotatably mounted coaXially of the yfor clamping a blank upon the blank supn port, spring means :tor retaining said member in clam Jin@ Josition and means for mov- 'u e ba o ing said clamping member against the resistance of the spring comprising an arm journaled coaxially of the blank support, a eam rotatably mounted eoaxially of the cradle and means operatively connecting the cam and arm.

t. In a gear generating machine, a tool. a rotatable blank support', a movable cradle upon which the blank supportis mounted, means for positioning the tool and blank in operative relationship, a member adapted to be moved axially in one direction to clamp a blank on the blank support and. to be moved axially in the opposite direction to release said blank, a tiltable member adapted to be rocked from a position of alignment with said member to a position at an angle thereto to movethe iirst named member'into released position, an arm journaled on said tiltable member. a crank rotatably mounted coaxially of said cradle and means eonnecting said crank with said movable member whereby said movable member may be actuated on rotation of the c `ank.

7. In a gear generating machine;v a tool, a rotatable blank support, a movable cradle upon which the blank support is mounted, means Jfor positioning the tool and blank in operative relationship, a member adapted to be moved axially in one direction to clamp a blank on the blank support and to be moved axially in the opposite direction to release said blank, a tiltable member adapted to be rocked from a position in alignment with the first member to a position at an angle thereto to move the irst member into released position, a cam rotatably mounted eoaxially of the cradle, a double armed lever, one. arm of which is arranged at an angle to the tiltable member and is journaled thereon, and the other arm of which carries a follower adapted to engage said cam, and means for holding the follower in engagement with the crank.

`S. In a gear generating machine, a tool, a rotatable blank support, a movable c 1adle upon which the blank support is mounted, means for positioning the tool and blank in operative relationship, a member adapted to be moved axially in one direction to clamp a blank on the blank support and to be moved axially in the opposite direction to release said blank, spring means for urging,r said member constantly into clamping position, a tiltable member adapted to be rocked from a position of alignment with said member to a position at an angle thereto to move the first named member against the resistance of the spring, a ball and socket connection between said first member and the tiltable member, an arm liournaled on the tiltable member, a cani rotatably mounted eoaxially of the cradle, a roller carried by the arm adapted to engage the cam, means `for holding the roller in engagement with the cam, and means for rotating;l said cam.

9. In a chuck, the combination of a sleeve, a rod reciproeable in said sleeve, means carried by said rod adapted to engage the outer tace ot' an object to be eliucked, a coil spring interposed bet-Ween said rod and sleeve for lforcing the rod axially in said sleeve to clamp the object on the sleeve, a tiltable member mounted in said sleeve having a stem portion extending through an opening in the outer end of said sleeve and provided with a socket in its front face and with a rounded outer face adapted to seat against a flat surface provided on the inner end Face Mot said sleeve. a ball abutting the end tace of said lrod and seating in the socket ot' said member, and means secured to said stem for rockingr said member.

l0. In a chuck, the combination of a sleeve, a rod reciprocable in said sleeve, means carried by said rod adapted to engage the outer face ot' the object to be chucked, means ior forcing the rod axially in said sleeve to clamp the object on said sleeve, a tiltable member mounted in said sleeve and provided "with a socket in its front tace and with a rounded outer face adapted to seat in said sleeve, a ball abuttingthe end tace of said rod and seating in the socket in said member and means for rockintgr said member Jfrom a position of alignment with said rod to a. position at an angle thereto to release the clamping means.

EYVIN D FNSEN. SCHUYLER H. EARL. 

